scholarly journals Research of sewage intake of small settlements in dry weather

Vestnik MGSU ◽  
2019 ◽  
pp. 225-236 ◽  
Author(s):  
Irina I. Ivanenkо ◽  
Kseniya S. Senicheva
Keyword(s):  
Wastewater Treatment ◽  
Sewage Treatment ◽  
Full Scale ◽  
Leningrad Region ◽  
Design Practice ◽  
Daily Consumption ◽  
Sewage Treatment Plants ◽  
Large Cities ◽  
Treatment Technologies ◽  
Definition Of

Introduction. Attempts to apply classical wastewater treatment technologies to small volumes are often impossible due to the high irregularity of wastewater inflows, and fundamental fluctuations in the composition of wastewaters, which are very diverse in comparison with medium and large cities. At three sites located in the Leningrad Region, full-scale measurements of wastewater discharges from settlements with a population of 1000 people and an industrial enterprise were carried out in order to determine the irregularity coefficients of wastewater during the dry season. The irregularity coefficients used in the design practice for such objects differ greatly in their values, as determined in the process of analyzing the literature data, which, when designing head sewage treatment plants, can lead to significant errors in calculations. Materials and methods. Measurement of a daily consumption of sewage flowmeters counters, elimination of improbable values, definition of consumption in dry weather, comparison of these various objects. Results. Mathematical dependences are proposed for describing fluctuations in the daily coefficient of irregularity of waste during the year. It was proposed to describe the weekly fluctuation of expenses with the help of the weekly coefficient of non-uniformity and its values were determined for the studied objects. A method has been developed for determining estimated costs for small objects with a population of 1000 people. Conclusions. The developed technique allows to predict the size of coefficient of daily unevenness within a year in dry weather for small settlements with number of inhabitants of 1000 people and a small share of production drains. It is possible to recommend values of coefficients of week unevenness.

scholarly journals Management of wastewater trough theatre

2019 ◽  
Author(s):  
Kristina Tihomirova ◽  
Linda Mezule
Keyword(s):  
Wastewater Treatment ◽  
Teaching Method ◽  
Sewage Treatment ◽  
Student Knowledge ◽  
Cooperation Model ◽  
Treatment Technologies ◽  
Water And Wastewater ◽  
Active Communication ◽  
The University ◽  
Industrial Sewage

Compulsory study course on wastewater treatment and sewage systems contains lectures, classroom calculations, technical project and laboratory practicum. The course is addressing not only the developing skills in wastewater treatment technologies but also provides preparation of professionals that can communicate with institutions involved in water and wastewater sector. Over the years it has been observed that even after receiving the most sophisticated knowledge and highest markings, students often lack skills in practical communication with industry and implementation of theoretical knowledge in praxis. Here we describe student-centred teaching method that is based on the activities that are similar to theatre and allow: (i) the teacher to find and understand the weaker places in student knowledge gained during the semester; (ii) the students to form professional skills during the active communication with colleagues and mentors from industry. The students work in several groups “INDUSTRY”, “MUNICIPALITY” and EXPERTS”, try to find better solution for industrial sewage treatment and cooperation model with the municipality and present their results. After 2 years of the modernisation and adjustment, the training course has created an interest not only from student side but also from the industry representatives that are interested in communication with the new specialists and develop strong contacts with the university.

A correlation method for the estimation of retention times at full-scale sewage treatment plants

1980 ◽  
Vol 14 (6) ◽  
pp. 567-574 ◽  
Author(s):  
John M. Crowther ◽  
John F. Dalrymple ◽  
Terence Woodhead ◽  
Peter Coackley ◽  
Ian M. Hamilton
Keyword(s):  
Sewage Treatment ◽  
Correlation Method ◽  
Full Scale ◽  
Sewage Treatment Plants

Lacks and needs of R&D on wastewater treatment in small populations

2011 ◽  
Vol 6 (2) ◽  
Author(s):  
C. A. Aragón ◽  
J. J. Salas ◽  
E. Ortega ◽  
Y. Ferrer
Keyword(s):  
Wastewater Treatment ◽  
Sewage Treatment ◽  
Small Towns ◽  
Small Populations ◽  
Research Groups ◽  
National Plan ◽  
Small Communities ◽  
Large Cities ◽  
Wide Range ◽  
New Treatment

Wastewater treatment in small communities, with less of 2,000 population equivalent, is one of the priorities of the new Spanish National Plan for Water Quality: Sanitation and Purification (2007-2015). Due to the peculiarities of the small agglomerations, the treatment solutions used in medium and large cities usually do not give satisfactory results if they are implanted directly into those communities. It is therefore necessary to adapt these technologies to the small towns or to search for new treatment solutions. In this regard, R&D activities play a key role. In fact, many research groups address their activities to the study of sanitation and treatment of small populations. In relation to the technologies studied there is a wide range that includes both extensive and intensive technologies. In the case of Spain, as in other countries, constructed wetlands seem to be the most studied technology in the recent years to sewage treatment in small settlements. However, there are still areas of study to be promoted in order to solve the current problems of sanitation and wastewater treatment in small settlements.

scholarly journals ANALYSIS OF THE FEATURES OF CREATING A UNIFIED SCHEME FOR THE RECONSTRUCTION OF SEWAGE TREATMENT PLANTS OF THE REPUBLIC OF CRIMEA

2021 ◽  
Vol 9 (4) ◽  
pp. 36-40
Author(s):  
Svetlana Chutchenko ◽  
Nadezhda Dzhulay
Keyword(s):  
Wastewater Treatment ◽  
Sewage Treatment ◽  
Sewage Treatment Plants ◽  
The Creation ◽  
The Republic

The article deals with the problem of construction and reconstruction of sewage treatment plants and the creation of a new unified scheme for the reconstruction of sewage treatment plants of the Republic of Crimea to bring the parameters of wastewater treatment to the norms of Russian legislation.

scholarly journals Efficiency of Sewage Treatment Plants in the Sequential Batch Reactor

2018 ◽  
Vol 28 (3) ◽  
pp. 121-131 ◽  
Author(s):  
Anita Jakubaszek ◽  
Artur Stadnik
Keyword(s):  
Wastewater Treatment ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Suspended Solids ◽  
Wastewater Treatment Plants ◽  
Batch Reactor ◽  
Sewage Treatment ◽  
Total Suspended Solids ◽  
Sewage Treatment Plants ◽  
Sequential Batch Reactor

Abstract The article analyzes the effectiveness of individual Actibloc wastewater treatment plants (produced by Sotralentz) working in the technology of low-rate activated sludge in the Sequential Batch Reactor (SBR) system. The assessment of the effectiveness of household wastewater treatment plants was made on the basis of pollutants: BOD5, COD, total suspended solids, total nitrogen and total phosphorus. The research objects were four household sewage treatment plants located in: Lubań, Kłębanowice, Stara Rzeka and Kościan. The efficiency of removing pollutants in the examined facilities was in the range of: BOD5 92.2 ÷ 97.2%, COD 82.6 ÷ 89.9%, total suspended solids 90.2 ÷ 96.2%, total nitrogen 50.8 ÷ 83.1%, total phosphorus 46.5 ÷ 73.6%. The treated wastewater met the requirements set out in the Regulation of the Minister of the Environment on the conditions to be met when discharging sewage into water or soil, and on substances particularly harmful to the aquatic environment (Journal of Laws 2014, item 1800) in terms of indicators such as BOD5, COD, total suspended solids and total nitrogen. The effectiveness of phosphorus removal in the studied treatment plants was much lower.

Upgrading for Biological Nitrogen Removal – Some Full-Scale Experiences from Sweden

1990 ◽  
Vol 22 (7-8) ◽  
pp. 93-104 ◽  
Author(s):  
Bengt Andersson ◽  
Björn Rosén
Keyword(s):  
Nitrogen Removal ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Development Program ◽  
Organic Content ◽  
Full Scale ◽  
Municipal Sewage ◽  
Biological Nitrogen Removal ◽  
Sewage Treatment Plants ◽  
Biological Nitrogen

Nitrogen removal is now required by the Swedish parliament. The new requirements will be valid before 1995 and in some cases before 1992. A comprehensive development program, mostly in full scale at about 35 municipal sewage treatment plants, has been started to meet the new demands. In order to co-ordinate all activities, a National Nitrogen Project with representatives from authorities and municipalities has been formed. The general ambition is to meet the demand by process development, using existing volumes rather than to invest in civil works. A Swedish concept has appeared, which in most cases has served as a guideline for the development program. The basic principles are to decrease the load on the biological process by pre-precipitation, to utilize the remaining organic content in the wastewater in a pre-denitrification system, to increase the active biomass in the biological system and to use a two-sludge system with post-denitrification. In this paper, some experiences from the activities in Sweden are discussed and exemplified with results mainly from Falkenberg, Malmö and Norrköping. The treatment plant in Falkenberg was the first to introduce biological nitrogen removal in Sweden. A pre-denitrification system has been in operation since May 1983 with good results. Comprehensive full-scale and pilot tests are in operation at the Sjölunda and Klagshamn sewage treatment plants in Malmö. Special interests have been paid to studies on different applications of fixed film technology. The plant in Norrköping is operated with pre-precipitation followed by combined pre- and post-denitrification.

scholarly journals Microplastic Abundance In Volga River: Results Of A Pilot Study In Summer 2020

2021 ◽  
Vol 14 (3) ◽  
pp. 82-93
Author(s):  
Anastasia A. Lisina ◽  
Maxim M. Platonov ◽  
Oleg I. Lomakov ◽  
Alexey A. Sazonov ◽  
Tatiana V. Shishova ◽  
...  
Keyword(s):  
Pilot Study ◽  
Sewage Treatment ◽  
Water Layer ◽  
Average Concentration ◽  
Volga River ◽  
Sewage Treatment Plants ◽  
Large Cities ◽  
Cheboksary Reservoir ◽  
Downstream Area

In order to analyze the problem of microplastics pollution a comprehensive environmental survey was conducted along the entire Volga river in summer of 2020. The analysis of 34 water samples allowed us to determine the average concentration of microplastic (MP) in the surface water layer of the Volga river which accounted for 0.90 items/m3 (0.21 mg/m3). MP particles were found in all samples taken. The concentrations ranged from 0.16 to 4.10 items/m3 (from 0.04 mg/m3 to 1.29 mg/m3). The maximum MP concentrations were recorded in large cities downstream of the sewage treatment plants. For Tver, Nizhny Novgorod, Kazan and Volgograd they reached 3.77, 1.91,4.10 and 1.34 items/m3 respectively. The key role of large settlements as sources of MP in the Volga water was revealed. The minimum MP concentrations were recorded upstream of the large cities showing relatively stable levels of 0.25 items/m3 (0.05 mg/m3). The lowest MP content (0.16 items/m3) was revealed in the downstream area of the Cheboksary reservoir near Cheboksary. The results of weighing MP particles showed that their average concentration in the Volga water is 0.21 mg/m3. In each of the investigated samples particles of three determined fractions - fragments, fibers and films - were found, however, their ratio was not constant. On average, the proportion of fragments and films in the Volga water was 41% and 37% respectively and share of fibers accounted for 22%.

scholarly journals OPTIMIZATION OF TECHNOLOGICAL PROCESSES OF THE SEWAGE TREATMENT PLANTS OF THE OIL REFINERY TO REDUCE THE OIL SLUDGE VOLUMES

2017 ◽  
pp. 16-20
Author(s):  
Ruslan Aleksandrovich Burnashev ◽  
Natalia Nickolaevna Artemieva ◽  
Yuriy Aleksandrovich Maksimenko
Keyword(s):  
Wastewater Treatment ◽  
Oil And Gas ◽  
Sewage Treatment ◽  
Oil Refinery ◽  
Oil Sludge ◽  
Purification Method ◽  
Sewage Treatment Plants ◽  
Technological Processes ◽  
Technical Solutions

In terms of the problem of accumulating the oil sludge volumes during exploitation of oil and gas deposits there has been considered the question of increasing efficiency of wastewater treatment by means of sewage treatment plants. Modernization of the obsolete design of oil traps and the use of an adsorption purification method have been proposed. Implementation of new technical solutions will reduce the volume of accumulated wastes.

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